smartwin sliding is the first certified passive house sliding door on the market.  A complete encompassing air-tightness seal provides unparalleled levels of air-tightness.

Visually, the sliding door is exactly the same proportions as the smartwin window. The product was certified with an ‘phA’ rating by the Passivhaus Institute in Darmstadt.    

Again, ‘phA’ rated passive house windows made by your local manufacturer.